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| author | Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> | 2018-01-12 18:50:33 -0200 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-01-29 14:50:19 -0200 |
| commit | bbabb868cd248763373d0db763bacd84ce27ede8 (patch) | |
| tree | 2ac0607cae70a7f678bb910dbffdab606ab8414e /malloc/malloc.c | |
| parent | 38e08dc3e00fc27d127701175018cac4ddaf998e (diff) | |
| download | glibc-bbabb868cd248763373d0db763bacd84ce27ede8.tar.gz glibc-bbabb868cd248763373d0db763bacd84ce27ede8.tar.xz glibc-bbabb868cd248763373d0db763bacd84ce27ede8.zip | |
powerpc: Fix syscalls during early process initialization [BZ #22685]
The tunables framework needs to execute syscall early in process
initialization, before the TCB is available for consumption. This
behavior conflicts with powerpc{|64|64le}'s lock elision code, that
checks the TCB before trying to abort transactions immediately before
executing a syscall.
This patch adds a powerpc-specific implementation of __access_noerrno
that does not abort transactions before the executing syscall.
Tested on powerpc{|64|64le}.
[BZ #22685]
* sysdeps/powerpc/powerpc32/sysdep.h (ABORT_TRANSACTION_IMPL): Renamed
from ABORT_TRANSACTION.
(ABORT_TRANSACTION): Redirect to ABORT_TRANSACTION_IMPL.
* sysdeps/powerpc/powerpc64/sysdep.h (ABORT_TRANSACTION,
ABORT_TRANSACTION_IMPL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/not-errno.h: New file. Reuse
Linux code, but remove the code that aborts transactions.
Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>
(cherry picked from commit 4612268a0ad8e3409d8ce2314dd2dd8ee0af5269)
Diffstat (limited to 'malloc/malloc.c')
0 files changed, 0 insertions, 0 deletions